Re: [faces-dev] change of specification or an error ?

[LInda hackkanan <lindahackkanan@xxxxxxxx>]

Thanks.

 

Using the error message java.lang.NumberFormatException: For input string: "Go "

I made some more guesses  I experimented with this

value="#{'50' + 70}"

 

the answer is 120 as the button label.

 

Something doesn't seem quite right to me.

Any insight into this would be good too ?

 

 

Sent: Friday, April 23, 2021 at 3:39 PM
From: "Thomas Andraschko" <tandraschko@xxxxxxxxxx>
To: "faces developer discussions" <faces-dev@xxxxxxxxxxx>
Subject: Re: [faces-dev] change of specification or an error ?

I think that never worked, not sure: https://stackoverflow.com/questions/3640254/string-concatenation-in-el

 

Am Fr., 23. Apr. 2021 um 16:30 Uhr schrieb LInda hackkanan <lindahackkanan@xxxxxxxx>:

 

I have a book I am using to practice Java Server Faces.

In this book  the example code given is

 

  <h:commandButton
      value="#{'Go ' + xyz.submit}" 
      action="">

 

Using the above syntax I was getting the error

java.lang.NumberFormatException: For input string: "Go "

 

After some intuitive guesses I changed the syntax to this.

                value="Go #{xyz.submit}"

 

This produced the expected results, so I now know how to dynamically update button label.

 

My question is ,  did the book provide me with incorrect syntax or

was there a change in the specification ?

 

 

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